I've been at a job near CPF-FR since January, and on several occasions, I've seen POED in the morning (usually between 7:30-9 when I've seen it), and it sometimes ties down on Track 17 between CPF-AS and FR. SEPO usually comes through around mid-day, and LA-1 is out and about by FR at various times between mid morning and mid afternoon.
In terms of safety, while Lawrence is not not the safest place, the area around FR (and as you go closer to the North Andover border) is generally fine during the day. As mentioned above, the area west of South Union can be a little hairier, but I've driven though a few times during daylight and not felt too uncomfortable from inside my car.